Increased effective barrier heights in Schottky diodes by molecular‐beam epitaxy of CoSi2and Ga‐doped Si on Si(111)

1988 ◽  
Vol 64 (8) ◽  
pp. 4082-4085 ◽  
Author(s):  
R. W. Fathauer ◽  
T. L. Lin ◽  
P. J. Grunthaner ◽  
P. O. Andersson ◽  
J. M. Iannelli ◽  
...  
Keyword(s):  
Molecular Beam Epitaxy ◽  
Molecular Beam ◽  
Schottky Diodes ◽  
Barrier Heights ◽  
Effective Barrier

Passivation of Gaas by Novel P2S5/(NH4)2Sx Sulfurization Techniques

1992 ◽  
Vol 281 ◽  
Author(s):  
J. T. Hsieh ◽  
C. Y. Sun ◽  
H. L. Hwang
Keyword(s):  
Photoelectron Spectroscopy ◽  
Surface Passivation ◽  
Schottky Diodes ◽  
Lower Surface ◽  
State Density ◽  
Surface Band ◽  
Band Bending ◽  
Barrier Heights ◽  
Effective Barrier ◽  
Metal Work

ABSTRACTA new surface passivation technique using P2S5/(NH4)2S on GaAs was investigated, and the results are compared with those of the (NH4)2Sx treatment. With this new surface treatment, the effective barrier heights for both Al- and Au—GaAs Schottky diodes were found to vary with the metal work functions, which is a clear evidence of the lower surface state density. Results of I—V measurements show that P2S5/(NH4)2S—passivated diodes have lower reverse leakage current and higher effective barrier height than those of the (NH4)2Sx -treated ones. Auger Electron Spectroscopy, X—ray photoelectron spectroscopy and Raman scattering measurements were done to characterize the surfaces including their compositions and surface band bending. In this paper, interpretations on this novel passivation effect is also provided.

scholarly journals Fabrication of Schottky Diodes on Zn-polar BeMgZnO/ZnO Heterostructure Grown by Plasma-assisted Molecular Beam Epitaxy

10.3791/58113 ◽  
2018 ◽  
Author(s):  
Kai Ding ◽  
Vitaliy Avrutin ◽  
Natalia Izioumskaia ◽  
Md Barkat Ullah ◽  
Ümit Özgür ◽  
...  
Keyword(s):  
Molecular Beam Epitaxy ◽  
Molecular Beam ◽  
Schottky Diodes

Characterization of Al/GaAs Schottky barriers with thin Si interfacial layers

1993 ◽  
Vol 51 ◽  
pp. 800-801
Author(s):  
M.W. Bench ◽  
T.J. Miller ◽  
M.I. Nathan ◽  
C.B. Carter
Keyword(s):  
Molecular Beam Epitaxy ◽  
Barrier Height ◽  
Molecular Beam ◽  
Schottky Diodes ◽  
Growth Conditions ◽  
High Energy ◽  
Exact Nature ◽  
Interfacial Layers ◽  
Transmission Electron ◽  
Layer Structures

It has been shown in previous reports that barrier height variations can be achieved in GaAs Schottky diodes grown using molecular beam epitaxy by utilizing a thin epitaxial Si layer (a few monolayers) between the GaAs and the Al contact. The effective barrier height was found to be dependent on the thickness and growth conditions of the Si layer. However, there has remained a question as to the exact nature of the interfacial Si layer. In the present investigation, samples with different Si layer thicknesses (no Si, 6 Å Si, and 20 Å Si, as determined in situ during growth using reflection high energy electron diffraction (RHEED)) were characterized using transmission electron microscopy (TEM) to determine the nature of the Si layers. In the present study, it was also found that the presence of the interfacial Si layers affected the growth orientation and morphology of the Al layers.The layer structures investigated were grown using molecular beam epitaxy in a system described elsewhere.

Evolution of Ti Schottky Barrier Heights on n-Type GaN with Annealing

1996 ◽  
Vol 449 ◽  
Author(s):  
Michèle T. Hirsch ◽  
Kristin J. Duxstad ◽  
E. E. Haller
Keyword(s):  
Barrier Height ◽  
Schottky Diodes ◽  
Electron Beam Evaporation ◽  
Organic Vapor ◽  
Barrier Heights ◽  
Effective Barrier ◽  
Mott Model ◽  
Current Voltage ◽  
Metal Organic ◽  
Ti Films

ABSTRACTWe report the effect of mild annealing on Ti Schottky diodes on n-type GaN. The Ti films were deposited by electron beam evaporation on n-type GaN grown by metal organic vapor deposition. We determine the effective barrier height Ф60 by current-voltage measurements as a function of temperature. The as-deposited Ti contacts show rectifying behavior with low barrier heights Ф60 ≤ 200meV. At annealing temperatures as low as 60°C we observe an increase of the barrier height to values of 250meV. After annealing at 230°C and above a stable barrier height of 450meV is measured. The increase in barrier height is not due to any macroscopic interfacial reaction. The origin of the observed changes are discussed in terms of the Schottky-Mott model and possible microscopic interfacial reactions.

GaN Schottky diodes with single-crystal aluminum barriers grown by plasma-assisted molecular beam epitaxy

2016 ◽  
Vol 109 (8) ◽  
pp. 082102 ◽  
Author(s):  
H. Y. Tseng ◽  
W. C. Yang ◽  
P. Y. Lee ◽  
C. W. Lin ◽  
Kai-Yuan Cheng ◽  
...  
Keyword(s):  
Molecular Beam Epitaxy ◽  
Single Crystal ◽  
Molecular Beam ◽  
Schottky Diodes
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